So, if you clicky on the link below you will find a .pdf holding a bunch of my house rules for determining intoxication, its impact and duration. There are also some new feats around booze and boozing, and an updated version of the play test condition, Intoxicated. Enjoy!
(Caveat: This is in no way supposed to make light of the serious issue of addiction or intoxication. Trust me, my real world work puts me face to face with the grimness of that on a daily basis. This is intended to give DM's some fairly simple rules for keeping track of drunkenness, and players some extra options).